Artificial tooth



(No Model.)

H. C. REGISTER.

' ARTIHGIAL TOOTH. N0. 333,782.

Patented Jan. 5, 1886.

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lUNITED STATES PATENT OFFICE.

HENRY C. REGISTER, OF PHILADELPHIA, PENNSYLVANIA.

ARTIFICIAL TOOTH.

SPECIFICATION forming part of Letters Patent No. 333,782, dated January5, 1886.

Application filed February S, 1884. Serial No. 120,127. (No model.)

To all whom it may concern.-

Be it known that I, HENRY C. REGISTER, a citizen of the United States,residing in the city and county of Philadelphia, in the State ofPennsylvania, have invented an Improvement in Artiiicial Teeth, of whichthe following is a specification.

My invention relates to the art of dentistry, and especially to thatbranch of dental practice which is known as prosthetic dentistry, and isconcerned ,with the repairing or replacing of natural teeth by means ofartificial teeth.

In Letters Patent of the United States No. 251,460, granted December 27,1881, upon my application, there is described as a new article ofmanufacture an artificial tooth or crown, which is transversely groovedor channeled across its upper portion.

My present invention is preferably employed in connection withartificial crowns of the above construction, and has for its object theformation of an artificial tooth of a character hereinafter describedand claimed, which can be applied either to a plate or artificial gum,or to a natural root.

Generally stated, my invention consists in an artificial tooth having aninternal cavity or matrix in its body, which cavity or matrix opens onlyat the top of the tooth, is invisible from any side thereof, is adaptedto contain cement or kindred retaining substance, and is provided withone or more pins, wires, staples, or kindred devices fastened into orotherwise secured to the substance of the tooth itself, and projectingas to a portion of their extent into the cavity proper, the office ofwhich devices is to form projections, retaining contrivances, oradditional surfaces about which the cementing material may adhere andiirmly set, with the result of securing the tooth itself more stronglyto said cementing material. The cavity may be of any desired shape ordimensions, but is preferably a dovetailed matrix or mold--that is tosay, a matrix larger interiorly than at its throat or top opening-to theend that the cementing material may more :tixedly hold within the tooth,and said cavity is preferably formed at the time when the tooth itselfis formed. The pins, wires, staples, or retaining devices, as Ihereinterm them, are made of platinum and embedded in the tooth at the time ofthe making of the latter, being Aburned into its vitreous substance by awell-known method in this art.

The invention is capable of employment in connection with teeth of anyshape.

In the four figures of the accompanying drawings I have represented incentral section forms of artificial teeth embodying my invention, inwhich- A represents the body of the tooth; B, the cavity; C, thefastening devices, and E the plate.

It is not necessary to show any special means of securing the teethinplace, as these means, when other than as represented in Fig. 4, arewell understood by those familiar with this class of prostheticdentistry.

While my invention is, as stated, preferably practiced in connectionwith artificial teeth transversely grooved or channeled across the upperportion, it is not necessarily restricted in application to teeth ofsuch description, but can be employed in connection with artificialteeth the top portions of which are of any desired shape.

Having thus described my invention, I claim and desire to secure byLetters Patent- As a new article of manufacture, an artificialtooth-crown the body of which is formed.

with a cavity opening at the top of the crown, and into the substance ofwhich crown are burned portions of platinum pins, hooks, staples, orkindred retaining devices, the remaining portions of which project intosaid cavity, substantially as and for the purposes set forth.

In testimony whereof I have hereunto signed my name this 26th day ofJanuary, A. D. 1884.

HENRY C. REGISTER.

In presence of-s J. BoNsALL TAYLOR, J onu JOLLEY, Jr.

